Most "date bugs" I've had to chase in production weren't off by a timezone. They were off by exactly one day, and they only appeared twice a year. The bug // "tomorrow, same time" const tomorrow = new Date(Date.now() + 86400 * 1000); That code is correct 363 days a year. On the other two it is off by an hour, and if you round the result down to a... Weiterlesen
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A Day Is Not 86400 Seconds: The DST Bug in Your Date Math
Most "date bugs" I've had to chase in production weren't off by a timezone. They were off by exactly one day, and they only appeared twice a year. The bug // "tomorrow, same time" const tomorrow = new…
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title: Detect Exploitation - A Day Is Not 86400 Seconds: The DST Bug in Your Date Math
id: 46af4767-58f8-42f8-9f0f-87e3e7edf750
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "A Day Is Not 86400 Seconds: Th" ascii wide
condition:
any of them
}tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich A Day Is Not 86400 Seconds: The DST Bug .... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
- 1. Perimeter-Inspektion: Relevante Portfreigaben und exponierte Endpunkte unverzüglich scannen.
- 2. Patch-Applikation: Hersteller-Hotfix einspielen oder betroffene Daemons in isolierte DMZ-Segmente überführen.
- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
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